9x^2-25x-2=0

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Solution for 9x^2-25x-2=0 equation:


Simplifying
9x2 + -25x + -2 = 0

Reorder the terms:
-2 + -25x + 9x2 = 0

Solving
-2 + -25x + 9x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
9 the coefficient of the squared term: 

Divide each side by '9'.
-0.2222222222 + -2.777777778x + x2 = 0

Move the constant term to the right:

Add '0.2222222222' to each side of the equation.
-0.2222222222 + -2.777777778x + 0.2222222222 + x2 = 0 + 0.2222222222

Reorder the terms:
-0.2222222222 + 0.2222222222 + -2.777777778x + x2 = 0 + 0.2222222222

Combine like terms: -0.2222222222 + 0.2222222222 = 0.0000000000
0.0000000000 + -2.777777778x + x2 = 0 + 0.2222222222
-2.777777778x + x2 = 0 + 0.2222222222

Combine like terms: 0 + 0.2222222222 = 0.2222222222
-2.777777778x + x2 = 0.2222222222

The x term is -2.777777778x.  Take half its coefficient (-1.388888889).
Square it (1.929012346) and add it to both sides.

Add '1.929012346' to each side of the equation.
-2.777777778x + 1.929012346 + x2 = 0.2222222222 + 1.929012346

Reorder the terms:
1.929012346 + -2.777777778x + x2 = 0.2222222222 + 1.929012346

Combine like terms: 0.2222222222 + 1.929012346 = 2.1512345682
1.929012346 + -2.777777778x + x2 = 2.1512345682

Factor a perfect square on the left side:
(x + -1.388888889)(x + -1.388888889) = 2.1512345682

Calculate the square root of the right side: 1.466708754

Break this problem into two subproblems by setting 
(x + -1.388888889) equal to 1.466708754 and -1.466708754.

Subproblem 1

x + -1.388888889 = 1.466708754 Simplifying x + -1.388888889 = 1.466708754 Reorder the terms: -1.388888889 + x = 1.466708754 Solving -1.388888889 + x = 1.466708754 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.388888889' to each side of the equation. -1.388888889 + 1.388888889 + x = 1.466708754 + 1.388888889 Combine like terms: -1.388888889 + 1.388888889 = 0.000000000 0.000000000 + x = 1.466708754 + 1.388888889 x = 1.466708754 + 1.388888889 Combine like terms: 1.466708754 + 1.388888889 = 2.855597643 x = 2.855597643 Simplifying x = 2.855597643

Subproblem 2

x + -1.388888889 = -1.466708754 Simplifying x + -1.388888889 = -1.466708754 Reorder the terms: -1.388888889 + x = -1.466708754 Solving -1.388888889 + x = -1.466708754 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.388888889' to each side of the equation. -1.388888889 + 1.388888889 + x = -1.466708754 + 1.388888889 Combine like terms: -1.388888889 + 1.388888889 = 0.000000000 0.000000000 + x = -1.466708754 + 1.388888889 x = -1.466708754 + 1.388888889 Combine like terms: -1.466708754 + 1.388888889 = -0.077819865 x = -0.077819865 Simplifying x = -0.077819865

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.855597643, -0.077819865}

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